Auxiliary apparatus for increasing the draft of the furnaces of



UNITED STATES PATENT OFFICE.

JOHN SWEENEY, OF CHICAGO, ILLINOIS.

AUXILIARY APPARATUS FOR INCREASING THE DRAFT OF THE FURNACES OF LOCOMOTIVE-ENGINES.

Specification of Letters Patent No. 33,011, dated August 6, 1861.

To all whom it may concern: f

Be it known that I, Jol-1N SwnnNnY, of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Blow -Cocks for Locomotives; and I do hereby declare that the tollowing is a full, clear, and exact description of the saine, reference being had to the annexed drawing, making a part of this specification, and to the letters oit reference marked thereon.

rlhe object of this invention is to produce a cheap, safe, and reliable arrangement to admit the steam into the smokepipe oi a locomotive at the saddle or base, for th purpose of increasing an insuiiicient draft.

To enable others skilled in the art to make and use my invention l will proceed to describe its construction and operation.

Figure 1, oi" the drawing, is an external elevation of the improved cock or valve of my invention, showing more particularly the method of attaching the lever by which it is worked; and Fig. 2 is a section of the same, showing the internal parts.

The barrel a is screwed at Z) into the dome or any other part of the boiler, and has a winged valve c ground into a conical seat at its internal end. This valve is secured by a screw nut against a shoulder on the valve stem d, which passes through a stuiling box c on the external end of the barrel, and is fitted with jaws or a head for the reception of the lever g that operates the valve. The ulcrum 7L of the lever g, is carried by an arm i otl the standard 7c, that is screwed into the socket Z cast on the barrel. The other end of the lever g, which is represented as broken oft in the drawing, may be itted with a handle, or connected with a wire to a handle placed in any position convenient to the engineer. The branch nozzle m is cast on the barrel, and is provided with a screw coupling n, by which the flange of the blow pipe 0 is secured.

As will be seen :from the above description, this valve is simple in construction, and not liable to get out of order, or to stick in its seat, and is therefore preferable to the plug cock generally employed.

laving thus described the details ot' the construction and operation of my said valve or cock, T will proceed t0 describe more particularl y the arrangement of it on the front or dome or" a locomotive boiler in connection with a blow pipe leading' to the chimney, which :forms the subject of my invention.

Sheet H of the drawing hereunto annexed is a diagram of the arrangement of boiler, blow cock and pipe, and chimney, according to my said invention.

The same letters of reference indicate the parts similar to those on the drawing oit the details of the blow cock above described.

The barrel c is screwed into the plate Z) ot the boiler where itis convenient to the hand of the engineer, and the blow pipe o leads over the top of the boiler to the chimney y), within which it is'turned upward so that the blast of steam from the pipe rushes up the chimney and thereby increases the draft. The handle g is situated in Jfront of the engineer as he stands on the foot plate under the cab.

T claim as my invention, and desire to secure by Letters Patent- The arrangement of a blow cock, or valve, as described, upon the front or dome of a boiler, and with a pipe leading to the chimney in the manner and for the purpose specified.

JOHN SWEENEY.

Witnesses EDwD. P. DOLE, H. C. ARIN. 

